NH fuse link 3NA COM with measuring function, size 2 In 250A Un 400V, operating class gG with electronic module, live grip lugs and front indicator Please note the radio approval! List of countries: see certificates NH fuse link SENTRON 3NA3 for selective line and system protection. The NH fuse system offers effective protection for people, equipment and systems by safely switching off in the event of overload and short circuit. The 3NA COM fuses enable high network transparency through current measurement and wireless communication and are therefore ideally suited for the digitalization of power grids. The standardized design enables simple and cost-effective retrofitting in existing systems. The NH fuse links are available from 2 A to 1250 A and in sizes 000, 00, 0, 1, 2, 3, 4 and 4a. The variants with communication and measuring function in size 2 from 80 A to 315 A.SENTRON protective switching devices - a safe choice. Now even smarter.